Não informado. (1969). Screen. Society for Education in Film and Television.
Chicago-viite (17. p.)Não informado. Screen. London: Society for Education in Film and Television, 1969.
MLA-viite (8. p.)Não informado. Screen. Society for Education in Film and Television, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.